Lewis Hamilton to Mercedes - Jenson Button and Fernando Alonso on move
Jenson Button believes Lewis Hamilton is leaving McLaren for Mercedes because he wants a new challenge, but insists he is not thinking of moving himself.
Button drove under Ross Brawn - now team principal at Mercedes - in 2009, and says Hamilton will be working with a "great bunch of people".
Ferrari's Fernando Alonso, meanwhile, thinks Hamilton has left McLaren "for a better life", saying it is good to "move on" from his former team.
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